How to use the UNDERSCORE framework in the Java library for rapid development

How to use the UNDERSCORE framework in the Java library for rapid development introduction: UNDERSCORE is a Java library that provides a powerful set of functions that allows Java developers to develop faster and efficiently.This article will introduce the basic concepts and usage methods of the UNDERSCORE framework, and provide some Java code examples to help readers better understand how to use the UNDERSCORE framework in the Java library for rapid development. 1. What is the UNDERSCORE framework The UNDERSCORE framework is a Java class library that supports functional programming and streaming operations.It provides a series of powerful tools that allow developers to process data structures such as collection and arrays in a more concise and elegant way.The core design idea of the UNDERSCORE framework is functional programming, which can simplify common operations, such as traversal, filtering, mapping, etc., thereby improving the readability and development efficiency of the code. 2. How to use the UNDERSCORE framework First, you need to add the UNDERSCORE library to the dependence of the Java project.You can introduce the dependencies of the UNDERSCORE framework by building tools such as Maven or Gradle. Next, introduce the Underscore framework class library in the Java code: import com.github.underscore.Underscore.*; You can start using various powerful features provided by the UNDERSCORE framework. 3. Collection operation example Here are some common collection of operation examples to help readers better understand how to use the UNDERSCORE framework. 3.1. Filter operation The UNDERSCORE framework provides the Filter method, which can filter the elements in the set according to specific conditions.For example, select all the even -numbers from an integer list: List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9); List<Integer> evenNumbers = _.filter(numbers, num -> num % 2 == 0); In the above examples, the Filter method is used and a lambda expression is passed in, which defines the selection conditions.In the end, the Evennumbers set will only contain even even. 3.2. Map operation The UNDERSCORE framework provides a MAP method that can mappore the elements in the collection in accordance with specific rules.For example, convert each string in a string list into uppercase: List<String> words = Arrays.asList("apple", "banana", "cherry"); List<String> upperCaseWords = _.map(words, String::toUpperCase); In the above examples, the MAP method is used and a method is introduced. The reference specifies the rules of converting the string into uppercase.In the end, the UPPERCASEWORDS set will contain conversion of the uppercase string. 4. Summary The UNDERSCORE framework is a powerful Java class library that supports functional programming and streaming operations, which can greatly simplify the coding work of Java developers and improve the readability and development efficiency of code.This article introduces the basic concepts and usage methods of the UNDERSCORE framework, and provides some common Java code examples. I hope to help readers better understand how to use the Underscore framework in the Java library for rapid development. Reference materials: - [Underscore github homepage] (https://github.com/javadev/underscore-java) - [Underscore Framework Document] (https://stative.javadoc.io/com.github.javadev/underscore/1.62/index.html)